UKRI wishes to establish a Contract for the provision of R80 Tower Decommissioning and Adiabatic Cooler Design and Build. The estimated value of this opportunity is £1,000,000 - £1,500,000. The scope includes management and delivery of design and construction services for the R80 Chilled water and process systems at the site address Rutherford Appleton Laboratory, Harwell, Oxford, Didcot OX11 0QX.
The Contractor is required to act as a design and build contractor and will be responsible for all civil, mechanical, electrical construction; installation and commissioning of the following – but not limited to - within the CDM Works area (i.e., The R80 roof area) and in accordance with the Completion Dates (See Provisional Programme within Appendix D - UKRI-1404 Project Brief).
- 8 No New Adiabatic coolers (AC’s).
- Connecting pipework and fittings to and the new AC’s within the CDM Works Area.
- All types of valves (isolation, regulating, non-return either manual or actuated).
- Commissioning sets and pressure reducing valves.
- Testing and drainage points.
- Basket and other Filters.
- All steel support work for the Adiabatic Coolers.
- All pipework supports.
- All local electrical power and signal cabling with cable trays etc and supports.
- All necessary civil surveying /setting out work.
The Contractor will be entirely responsible for organising the decommissioning and removal of the existing Balticare Cooling Towers within the CDM Works Area.
The aim is to modernize both the chilled and process water circuits. The preferred option is to cool the Process Water returned from the Hall’s area with a bank of 8 No ‘V’ Adiabatic Coolers capable of providing up to 3.2 MW cooling. These will be direct replacements for the existing BAC cooling towers.
The chillers - located in the adjacent plant room -will also be replaced (under a separate tender see R80-TECH—09A) with a number of more energy efficient modular alternatives (e.g. TURBOCOR range using a low GWP / non-flammable alternative refrigerant e.g. R513a) so as to provide a total Chilled water cooling capacity of 2.4MW. The chilled water system will remain as a primary circuit only since there is sufficient chilled water capacity (estimated 30 m3) within the large flow and return header pipes installed to the Hall’s area.